1255404340 has 12 divisors (see below), whose sum is σ = 2636349156. Its totient is φ = 502161728.

The previous prime is 1255404329. The next prime is 1255404341. The reversal of 1255404340 is 434045521.

It can be written as a sum of positive squares in 2 ways, for example, as 213276816 + 1042127524 = 14604^2 + 32282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1255404299 and 1255404308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255404341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31385089 + ... + 31385128.

It is an arithmetic number, because the mean of its divisors is an integer number (219695763).

Almost surely, 2^1255404340 is an apocalyptic number.

1255404340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255404340 is an abundant number, since it is smaller than the sum of its proper divisors (1380944816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1255404340 is a wasteful number, since it uses less digits than its factorization.

1255404340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62770226 (or 62770224 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1255404340 is about 35431.6855371008. The cubic root of 1255404340 is about 1078.7675527409.

Adding to 1255404340 its reverse (434045521), we get a palindrome (1689449861).

The spelling of 1255404340 in words is "one billion, two hundred fifty-five million, four hundred four thousand, three hundred forty".